Effects of molecular modifications for water splitting enhancement of BiVO4
Authors:
- Iwona Grądzka-Kurzaj,
- Qijun Meng,
- Brian J.J. Timmer,
- Oleksandr Kravchenko,
- Biaobiao Zhang,
- Mateusz Gierszewski,
- Marcin Ziółek
Abstract
Combined organic (molecular adsorption) and inorganic (TiO2 passivation) modifications for enhancing water splitting efficiency of porous bismuth vanadate electrodes are tested. The catalytic activity of BiVO4 is increased after adsorption of a newly prepared ruthenium catalyst. TiO2 passivation and sensitization with RuP dye does not show straightforward improvements to the complex photocatalytic behaviour depending on the configuration of the (two- or three-electrode) photoelectrochemical cell, type of the experiment and sample aging. The time constant for electron transport in BiVO4 electrodes (in the range of seconds, revealed by electrochemical impedance measurements) was found to correlate with the stable photocurrent of the cells. The femtosecond transient absorption studies confirm the negligible effects of RuP on the population of the photoexcited carriers in BiVO4. The transient absorption studies also show that the processes responsible for the differences in photocurrents of the modified BiVO4 samples occur on a time scale longer than the first nanoseconds.
- Record ID
- UAM40b284e1a4b84885b331d56520adca17
- Author
- Journal series
- International Journal of Hydrogen Energy, ISSN 0360-3199, e-ISSN 1879-3487
- Issue year
- 2020
- Vol
- 45
- No
- 30
- Pages
- 15129-15141
- Keywords in English
- Photoelectrochemical water splitting ; dye-sensitized photoelectrochemical cell ; ruthenium catalyst ; electron transfer ; hydrogen production
- ASJC Classification
- ; ; ;
- DOI
- DOI:10.1016/j.ijhydene.2020.03.237 Opening in a new tab
- Language
- (en) English
- File
-
- File: 1
- 1-s2.0-S0360319920312763-main.pdf
-
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 15-02-2022, ArticleFromJournal
- Publication indicators
- = 3; = 0; : 2018 = 1.128; : 2019 (2 years) = 4.939 - 2019 (5 years) =4.469
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAM40b284e1a4b84885b331d56520adca17/
- URN
urn:amu-prod:UAM40b284e1a4b84885b331d56520adca17
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.